We are working on LEED v4 project  - New construction (Gulf). We have targeted this credit for atleast 2 points. Here, I am unable to find any paint/adhesive/sealant manufacturer who carried out emission tests for their products. Does Greenguard or CDPH are costly tests?

It may be, general practice in US, but outside US, we are unable to produce such documents. Manufacture also seems reluctant to carry out such tests.